有人居住的世界的边界是由人类知识的极限决定的。

最具挑战性的设计往往会带来最有价值的成果。

"The world is a book, and those who do not travel read only a page."

Be yourself; everyone else is already taken.

Psychology must be based on direct experience, not inference.

Quantum cryptography doesn't rely on the difficulty of mathematical problems, but on the fundamental laws of physics.

Fools are the ones who cannot change their minds.